docs: def _start_from_base_entity(base_entity):
          """Convert a base entity to a node model.
  
          :type base_entity: pybel.dsl.BaseEntity
          :rtype: Node
          """
          return Node(
              type=base_entity.function,
              bel=base_entity.as_bel(),
              sha512=base_entity.sha512,
              data=json.dumps(base_entity),
          )